Positron trapping in BaTiO<SUB>3</SUB> perovskite

Positron lifetime spectra in BaTiO3 single crystals were measured at temperatures up to 873 K, also at room temperature after quenching from temperatures up to 473 K. The explored temperature range includes the ferroelectric to paraelectric phase transition. The material displays an irreversible beh...

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Autores principales: Macchi, Carlos Eugenio, Somoza, A., Dupasquier, A., López García, Alberto Raúl, Castro, Miriam Susana
Formato: Articulo
Lenguaje:Inglés
Publicado: 2001
Materias:
Física
BaTiO3
Ferroelectric
Positron annihilation
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/100937
https://ri.conicet.gov.ar/11336/36694
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-100937
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
BaTiO3
Ferroelectric
Positron annihilation
spellingShingle Física
BaTiO3
Ferroelectric
Positron annihilation
Macchi, Carlos Eugenio
Somoza, A.
Dupasquier, A.
López García, Alberto Raúl
Castro, Miriam Susana
Positron trapping in BaTiO<SUB>3</SUB> perovskite
topic_facet Física
BaTiO3
Ferroelectric
Positron annihilation
description Positron lifetime spectra in BaTiO3 single crystals were measured at temperatures up to 873 K, also at room temperature after quenching from temperatures up to 473 K. The explored temperature range includes the ferroelectric to paraelectric phase transition. The material displays an irreversible behaviour when heated, with anomalies around TC. The temperature dependence of the positron lifetime becomes reversible only after annealing above 550 K. The results suggest modifications of the charge state of non-equilibrium vacancies occurring at moderate temperature and microstructural changes taking place at high temperature. The reversible behaviour of the annealed crystal is consistent with thermally activated positron trap formation.
format Articulo
Articulo
author Macchi, Carlos Eugenio
Somoza, A.
Dupasquier, A.
López García, Alberto Raúl
Castro, Miriam Susana
author_facet Macchi, Carlos Eugenio
Somoza, A.
Dupasquier, A.
López García, Alberto Raúl
Castro, Miriam Susana
author_sort Macchi, Carlos Eugenio
title Positron trapping in BaTiO<SUB>3</SUB> perovskite
title_short Positron trapping in BaTiO<SUB>3</SUB> perovskite
title_full Positron trapping in BaTiO<SUB>3</SUB> perovskite
title_fullStr Positron trapping in BaTiO<SUB>3</SUB> perovskite
title_full_unstemmed Positron trapping in BaTiO<SUB>3</SUB> perovskite
title_sort positron trapping in batio<sub>3</sub> perovskite
publishDate 2001
url http://sedici.unlp.edu.ar/handle/10915/100937
https://ri.conicet.gov.ar/11336/36694
work_keys_str_mv AT macchicarloseugenio positrontrappinginbatiosub3subperovskite
AT somozaa positrontrappinginbatiosub3subperovskite
AT dupasquiera positrontrappinginbatiosub3subperovskite
AT lopezgarciaalbertoraul positrontrappinginbatiosub3subperovskite
AT castromiriamsusana positrontrappinginbatiosub3subperovskite
bdutipo_str Repositorios
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